Table 4.
ARDS or AHRF diagnoses and survival.
| Observed survival status: | |||
|---|---|---|---|
| ARDS | |||
| Died | Survived | ||
| Observed ARDS status: | ARDS | 18 (10.9) | 13 (20.1) |
| No ARDS | 2 (9.1) | 24 (16.9) | |
| AHRF | |||
| Observed AHRF status: | AHRF | 20 (14.7) | 22 (27.3) |
| No AHRF | 0 (5.3) | 15 (9.7) | |
Notes: Observed ARDS or AHRF status cross-classified with observed survival status, for the n = 57 cases in the total study sample. Expected counts under the null-hypothesis of no association between ARDS or AHR F status and survival are given in parentheses. For ARDS, the chi-square test-statistic is X2 = 15.6 on 1 degree of freedom, with P-value approximately 8 × 10−5. For AHRF, the chi-square test-statistic is X2 = 11.0 on 1 degree of freedom, with P-value approximately 9 × 10−4.